Which of the following molecules of RNA would you predict to be the most likely to fold into a specific structure as a result of intramolecular base-pairing?
(a) 5?-CCCUAAAAAAAAAAAAAAAAUUUUUUUUUUUUUUUUAGGG-3?
(b) 5?-UGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUG-3?
(c) 5?-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-3?
(d) 5?-GGAAAAGGAGAUGGGCAAGGGGAAAAGGAGAUGGGCAAGG-3?
Choice (a) is correct. Choices (b) and (c) do not have any opportunity for intramolecular base-pairing and thus a specific structure is unlikely. Although there is some opportunity for intramolecular base-pairing in choice (d), choice (a) has much more intrastrand complementarity and is a better choice.
You might also like to view...
Describe the chemical composition of DNA
What will be an ideal response?
Residual air volume is indicated by the letter ____
a. A b. B c. C d. D e. E
The biological species concept, formalized by Ernst Mayr in 1942, defined a species as a ________
A) group of individuals that inhabit the same location B) group of individuals with similar morphological characteristics C) population within and among which individuals actually or potentially interbreed and outside of which they do not interbreed D) group of individuals who share similar allelic frequencies E) population of individuals within and among which reproduction takes place frequently
Members of the Archaea:
A) are often founds in extreme environments B) sometimes produce methane gas C) all of these are true of Archaeans D) are prokaryotes E) are more closely related to eukaryotes than to bacteria